155872087 has 12 divisors (see below), whose sum is σ = 182931696. Its totient is φ = 132417600.

The previous prime is 155872049. The next prime is 155872109. The reversal of 155872087 is 780278551.

It is not a de Polignac number, because 155872087 - 2²⁷ = 21654359 is a prime.

It is a super-2 number, since 2×155872087² = 48592215011471138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155872007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8539 + ... + 19612.

It is an arithmetic number, because the mean of its divisors is an integer number (15244308).

Almost surely, 2^155872087 is an apocalyptic number.

155872087 is a deficient number, since it is larger than the sum of its proper divisors (27059609).

155872087 is a wasteful number, since it uses less digits than its factorization.

155872087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28278 (or 28271 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 43.

The square root of 155872087 is about 12484.8743285625. The cubic root of 155872087 is about 538.1740878833.

The spelling of 155872087 in words is "one hundred fifty-five million, eight hundred seventy-two thousand, eighty-seven".